The following parts were ordered today:
Postage for the above is RM12 as quoted. With RM649, I believe it is worth more than a purpose built NAS.
Since Saturday is a Public Holiday, I guess I'm getting the parts on Monday .. surely couldn't wait to put them together.
Anyway, the OS of choice will be either Debian/Lenny or Ubuntu Server though someone has suggested OpenSolaris because of the ZFS file system. I'm more inclined to Linux since I've been using it since ages ago.
Update Mon 19/10: Received the motherboard/process + RAM. Still waiting for the enclosure.
Update Tue 20/10: Received the casing now and done building up the system. Tried booting the Ubuntu Server installation disc from USB but it won't work.. had to install old CD ROM to the server now.